Exam 1 Test Map 1 Flashcards
shedding of the functional 2/3rds of the endometrium (compact & spongy layers) is initiated by periodic vasoconstriction in the upper layers of the endometrium. The basal layer is always retained, and regeneration begins near the end of the cycle from cells derived from the remaining glandular remnants or stromal cells in this layer
menstrual phase
a period of rapid growth lasting from about the 5th day to the time of ovulation. The endometrial surface is completely restored in approximately 4 days, or slightly before bleeding ceases. From this point on, an 8-to-10-fold thickening occurs, with a leveling off of growth at ovulation.
proliferative phase
extends from the day of ovulation to about 3 days before the next menstrual period. After ovulation, large amounts of progesterone are produced. An edematous, vascular, functional endometrium is now apparent. At the end, the fully matured secretory endometrium reaches the thickness of heavy, soft velvet. It becomes luxuriant with blood and glandular secretions, creating a suitable protective and nutritive bed for a fertilized ovum.
secretory phase
implantation of the fertilized ovum generally occurs about 7-10 days after ovulation. If fertilization and implantation do not occur, the corpus luteum, which secretes estrogen and progesterone, regresses. With the rapid decrease in progesterone and estrogen levels, the spiral arteries go into spasm. The blood supply to the functional endometrium is blocked and necrosis develops. The functional layer separates from the basal layer, and menstrual bleeding begins, marking day 1 of the next cycle
ischemic phase
phases of endometrial cycle
1) menstrual 2) proliferative 3) secretory 4) ischemic
phases of menstrual cycle
follicular and luteal
The primitive graafian follicles contain immature oocytes (primordial ova). Before ovulation, from 1 to 30 follicles begin to mature in each ovary under the influence of FSH and estrogen. The preovulatory surge of LH affects a selected follicle. The oocyte matures, ovulation occurs, and the empty follicle begins its transformation into the corpus luteum. This phase of the ovarian cycle varies in length from woman to woman. Almost all variations in ovarian cycle length are the result of variations in the length of the follicular phase.
follicular phase
begins immediately after ovulation and ends with the start of menstruation. This postovulatory phase of the ovarian cycle usually requires 14 days (range 13 to 15 days). The corpus luteum reaches its peak of functional activity 8 days after ovulation, secreting the steroids estrogen and progesterone. Coincident with this time of peak luteal functioning, the fertilized ovum is implanted in the endometrium. If no implantation occurs, the corpus luteum regresses and steroid levels drop. Two weeks after ovulation, if fertilization and implantation do not occur, the functional layer of the uterine endometrium is shed through menstruation.
luteal phase
the MAIN hormone/dominant hormone of the Follicular Phase.
estrogen
causes final maturation of the follicle;
follicle stimulating hormone (FSH)
causes ovulation
lutenizing horomone (LH)
must surge in order to ovulate in order to get pregnant
LH
the MAIN/dominant hormone in the Luteal Phase after ovulation
progesterone
these hormones drop 5-7 days before period
estrogen and progesterone
______ a woman’s basal body temperature is often less than 37° C (98.6° F);
before ovulation
_______, with increasing progesterone levels, her basal body temperature rises
after ovulation
mucus is viscous (thick) so that sperm penetration is discouraged.
Preovulatory and postovulatory
cervical mucus is thin and clear
It looks, feels, and stretches like egg white.
time of ovulation
It looks, feels, and stretches like egg white. This stretchable quality is termed
spinnbarkeit
Some women have localized lower abdominal pain called ____ that coincides with ovulation
mittelschmerz
Three signs of ovulation and normal follicle/ovum life and sperm life
-Elevation in body temp up to 0.5 degrees F due to release of progesterone after ovulation
-Mittelschmerz pain = in German “middle” (of cycle) and “pain”
Actual change in the lining of the ovary at the release of the ovum
-Cervical mucous increases for sperm transport to the Fallopian tube
Method for calculating estimated due date. It is based on the woman’s accurate recall of her last menstrual period (LMP).
Naegele’s Rule
describe Naegele’s Rule
It assumes that the woman has a 28-day cycle and that fertilization occurred on the 14th day. After determining LMP , subtract 3 calendar months, add 7 days, and add 1 year
Method for measuring Fundal Height which provides gross estimate of the duration of pregnancy.
Measurement is taken from the symphysis pubis to the top of the fundus
This allows us to use the +/-2 criteria to see if the growth patterns are predictable.
McDonald’s rule
Excessive increase in fundal height can lead to
could mean a multifetal gestation or polyhydramnios (Amniotic fluid in the uterus).
stable or decreased fundal height
intrauterine growth restriction
before measuring fundal height
the woman should empty her bladder for an accurate reading.